The bits blowing out of my air vents

Since I have had Winston these little bits of Styrofoam have been blowing out of my air vents. It's more of an annoyances rather than a issue. But what I cannot understand is where they keep coming from?

I don't even understand what it has been packing, these a just two lumps I pulled out of my air vents this morning. I don't know how long they will keep falling out but I wish it would stop soon it is starting to get rather annoying. Have you ever encountered a similar problem?